feat: Add clearAttachments to Scope

[xmanu]

📜 Description

We want to expose a method to clear the attachments on the scope.

💡 Motivation and Context

#1517

💚 How did you test it?

I added a test to ScopeTest to verify that the clearAttachments method really clears all attachments.

📝 Checklist

• I reviewed the submitted code
• I added tests to verify the changes
• I updated the docs if needed
• No breaking changes

🔮 Next steps

[marandaneto]

@xmanu thanks a lot :)

[philipphofmann]

Thanks a lot.